Force-feed lubricator



H. L'MCCULLOUGH.

FORCE FEED LUBRICATOR.

urucmou-mzo APR. Us. 1911.

1;,309,740, Y Patented July 15, 1919 2 SHEETS-SHEET nu: COLUMBIA PLANOGIAPH cm, wAsmNol-o H. L. MCCULLOUGH.

roacz mo LUBRICATOR.

APPLICATION FILED APR. 16, 191]- 1,309,740. Patented July 15., 1919.

Z SHEETS-SHEET 2- certain new and useful Improvements IForce-Feed Lubrlcators;

HENRY L. MQCULLOUGH, or ivrmnnnromsnmunsora.

FORCE-FEED LUBRIGATOR.

Specification of Letters Patent.

7 Patented July 15, 1919.

Application filed April 16, 1917. Serial No. 162,330.

To all whom it may concern:

Be it known that I, HENRY L. MoCuL- LOUGH, a citizen of the United States, reslding at Minneapolis, in the county of Hennepin and State of Minnesota, have invented 1n declare the following to be a full, clear, and exact description of the inventlon, suohas will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to force feed lubricators, such as are used for lubricating cylinders, valves, bearings, engines, and other machinery, and in one sense, is an improvement on or modificatlon of the pump lubricator disclosed and claimed in my Patent No. 872,2i9, ofdate, November 26, 1907. The present lubricator, however, differs materially from that of my pr1or patent in that .it involves primary and secondary pumps, the former of which delivers to a sight feed device and the latter of which receives the oil from the said sight feed devlce.

These primary and secondary pumps involve primary and secondary pump plungers axially seated Within a common osclllatory valve, and have threaded engagement therewith, whereby they are given axial movements by relative rotary movements of certain of the parts of the mechanism.

Not only is the arrangement of primary and secondary pumps important because it permits the use of a sight feed device, but it is even more important because it permits of an arrangement in which very materially increased 'or decreased movements of the secondary pump plunger produced, for example, by varying piston stroke, will not vary the amount of 011 supplied by the primary pump.

The preferred form ofthe improved lubricator pump is illustrated in the accompanying drawings, wherein. like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure 1 is a front elevation of the lubricator, some parts being broken away;

Fig. 2 1s a vlew chiefly in vertical section and I do hereby air compressors, gas

on the line 2-2 of Fig. 1, but with some parts in full; H Figs. 3 and 3 are end elevations of the valve casing, a valve and primary pumip plunger, but illustrating different positions of the parts; i j

Figs. 4 and 4 are sections taken on the line 44; of Fig, 1, but illustrating different positions of the parts; and

Figs. 5 and 5 are sections taken on the line 5-5 of Fig. 1, some parts being broken i .L Thenumeral (iv-indicates anoil receiver which, as shown, is of rectangular form and provlded w th a cover plate 7. The lower portion of one side ofthe receiver 6 has a large opening of which is rigidly secured with. a liquid tight joint tolth'e adjacent wall of the said receiver. The head ,8 is formed with an internally tapered valve seating sleeve 9 in Whichis, seated an oscillatory correspondingly tapered valve 10. Thevalve, respectively, in its inner and outer ends, has axially alined plunger seats 11 and12 in which, respectively, work with threaded engagement, a so-called primary pump plunger 13, and a so-called secondary pump plunger 14. The projecting end of the primary pump plunger 13 has a radial stop cam 15 against which a washer 16 is seated by a spring 17 the inner end of which is seated against a shoulder on the sleeve 9, so that it not only takes up play between the threads of the pump plunger 13 and the valve, but also sleeve 9;

The pump plunger 14 projects from the outer end'of the valve but is connected thereto under very considerable frictionas shown, by a pliable packing .19, a coiled spring 20 and a spring "adjusting cap: or

packing nut 21, Whichlatter has threaded engagement wlth the outer end of the said secondary pumlp plunger. The valve 10 has I I that is closed by a casting 8' that pro ects 1111301116 receiver and the flange apro ecting annular flange formed, with two stop surfaces 10 and 10 that are adapted to engage, respectively, with the end and under side of a threaded stop bolt or screw 23 that worksin, a lug 24 on the outer, side ofthe casting 8.

In the intermediate portion of its bottom, the sleeve 9 has an oi-l intakeport25, and at a diametrically opposite upper point, it is provided with a discharge port 26Itl1atis connected to the lower end of a sight feed tube ,27, that delivers into the upper portion of a small stand pipe 28. Theupper portion 28 of this stand pipe '28 is preferably of glass, so that the amount of oil taken from the sight tube 27 beconstantly observed. The contracted lower end of the stand'pipe 28 is screwedintotheoast "ing 8 and delivers togand ini faclt constitutes,

an upper extension of inner end of "the piston sea-t through branch pipes.

a secondary oil receiver or chamber 29. a

Leading downward from the bottom of the secondary oil receiver or chamber 29 s an oil delivery port 30' thatopens intothe L di from the valve seat of the casting Sis port or .oil discharge conduit 31 thatconneets' to an oil 'di'sch'argeor delivery pipe 32 from which the lubricant will 'be fed to ,the place where it is to be used, either directly or Before describingthe apparatus, attention 1s called to the fact that the frictional engagement between'secondary plunger 1% and valve 10'is materially greater than the frictional engagement between primary plunger 13' and said valve and is also materially greater than the frictional engagement between said valve 10" and thesleeve 9.

As a' starting lpoint, let it be assumed that the parts are in the'rel'ative positions shown Figs. 1, 2, 3 4 and 5 Now let it be assumed that the arm 22 is moved from righttoward the left, in respect to Fig. 1, far enough to produce the following operations:

- At first the valve and both pump plun gers move together, or as if one, until the pin 15" strikes the stop 18, whereuponilthe primary pump plunger 13 will be stopped, but the valve 10, with the secondary pump plunger 14 will still move until the stop 10 strikes the ,end of the stop bolt 23, whereupon the said valve will be stopped. Up to this time, the secondary plunger 14 has not been moved within the valve, but note, the valve being stopped, and its movement being constantly toward the right, it will be screwed outwardly; Immediately after the above noted movement of the primary pump plunger 13 is stopped, continued movement of the valve 10 will cause .said plunger to move outward in its seat stopped.

- which,

ne d cou that regardless of the amount of movement oil that will be drawn into said seat 11 will depend on the I amount of movementgiven to the valve 10 in the directionstated, after the rotation of the said plunger 13 has been The valve 10 is provided with a port 35 shown in Fig. 5 registers with port 31, and when said valve is in position shown in Fig. '5, registers with port 30-. Up to the time" thatvalve 10 is stopped in its rotation by engagement of stop 10* with stop bolt 23, the secondary pump plunger le isno-tmoved within its seat in va1ve'10.

Afterthe above noted movement of said ,valve has been stopped, further oscillatory movement of arm'22 and plunger 14: will jcjause the latter to move outwardly in said valve, thereby drawing from secondary oil clia iiber 29 through ports '30 and 35, then registered, as. shown in Fig. '5, into secwhen the valve is in the position ondalry pump chamber 12, and which oil was delivered into said chamber 29. by a previous action of the pump presently to he oe W t u sa n given .to'the arm' 22 and plunger 14, after the valve has been stopped "in its rotation, t e a d Plun cannot possibly drawjinto the secondary pump chamber 12 any more oil than was "delivered into the chamber 29 by a previous action of the primary pump plunger. I

lVhen arm 22 is moved from its extreme position at the left backtoward its extreme position toward 'the right, the valve 10 and two plungers 13 and 14: will move together until the ,stoppin 15 strikes stop 18 at whichtime, ports 25 and. 33 will be out of registrationpand ports 34 and 26 will be in registration. This registration of the valves 26 a'nd3-t will be maintained while valve 10 is being rotated farther toward the right, thereby causing plunger 15' to move inward into-seat 11 and to positively discharge oil therefrom, outthrough sight feed tube 27. this time, the stop 10 strikes stop bolt 23, thereby intercepting further movement of valve 10 inthedirection last noted, and then stopping valve 10 with port The valve beingnow stopped, the arm 22 and secondary plunger 14 continue to rotate toward the 1 right, said plunger will be 35 of secondary; plunger seat 12 in registra- 'tion' with idischarge'port 3-1 (see Fig. 5).

working with discharge, primary and secondary plungers working in said valve, said secondary plunger operating to force the lubricant to said discharge, and said primary plunger serving to force the lubricant to said secondary plunger.

2. A pump lubricator comprising a container for the lubricant, an oscillating valve for receiving a quantity of the lubricant from said container and carrying it to a discharge, primary and secondary plungers working with threaded engagement in sai valve, said secondary plunger operating to force the lubricant to said discharge, and said primary plunger serving to force the lubricant to said secondary plunger.

8. A pump lubricator comprising a container for the lubricant, an oscillating valve for receiving a quantity of the lubricant from said container and carrying it to a discharge, primary and secondary plungers working with threaded engagement in said valve, said secondary plunger operating to force the lubricant to said discharge, and a sight feed device receiving from said primary plunger and delivering to said secondary plunger.

4. A pump lubricator comprising a container for the lubricant, an oscillating valve for receiving a quantity of the lubricant from said container and carrying it to a discharge, primary and secondary plungers threaded engagement in said valve, said secondary plunger operating to force the lubricant to said discharge, a sight feed device receiving from said primary plunger and delivering to said secondary plunger, means for oscillating-said secondary plunger, means limiting the oscillatory Copies of this patent may be obtained for five cents each, by addressing the movement of said valve to a movement less than that of said secondary plunger, and means for limiting the oscillatory movement of said primary plunger to a movement less than that of said valve.

5. A pump lubricator comprising a container for the lubricant, an oscillating valve for receiving a quantity of the lubricant from said container and carrying it to a discharge, primary and secondary plungers working with threaded engagement in said valve, said secondary plunger operating to force the lubricant to said discharge, a sight feed device receiving from said primary plunger and delivering to said secondary plunger, means for oscillating said secondary plunger, means limiting the oscillatory movement of said valve to a movement less than that.of said secondary plunger, and means for limiting the oscillatory movement of said primary plunger to a movement less than that of said valve, the frictional engagement between said valve and secondary plunger being greater than that under which said valve is seated and greater than that friction which is between said valve and primary plunger.

6. A pump lubricator comprising a container for the lubricant, a cut-off valve and cooperating primary and secondary plungers, and means for moving said plungerswith differently timed actions.

In testimony whereof I affiX my signature in presence of two Witnesses.

HENRY L. MQCULLOUGH.

Witnesses:

BERNICE G. WHEELER, HARRY D. KILGORE.

Commissioner of Patents,

Washington, D. 0. 

